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Material for treating metal pickling waste liquid and preparation method of material

A metal acid and waste liquid technology, which is applied in metallurgical wastewater treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of high operating cost and unsatisfactory treatment effect, and achieve low operating cost, stable water quality, and equipment simple effect

Inactive Publication Date: 2016-06-01
广西钦州环科水处理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The waste liquid produced by metal pickling has always been a big problem in environmental protection engineering. It is very expensive to use heating or freezing methods. Most of them use neutralization methods, but the treatment effect is not ideal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Stainless steel pickling produces waste liquid (acid is 1.2ml / L, soluble ion is 28g / L) processing, comprises the following steps:

[0020] 1) Pretreatment: filter the waste liquid, and the fiber filter removes solids and suspended matter in the waste liquid;

[0021] 2) Put the waste liquid after 1) pretreatment into the synthetic polymer system (according to the ratio of polymer mass to waste liquid mass: 3:1), the acid content of the discharged water after treatment is 0.05ml / L, and the soluble metal Salt is 1g / L;

[0022] 3) Backwash to separate the dissolved metal salt solution and acid solution (according to the ratio of the original waste liquid treatment to the backflush water 2:1), the acid contained in the soluble metal salt is 0.53ml / L, and the salt content is 23g / L L, the acid content in the obtained acid solution is 0.4mol / L, and the salt content is 2g / L, which is directly returned to pickling for use;

[0023] 4) Dissolved metal ion solution treatment, us...

Embodiment 2

[0027] The treatment of waste acid solution (1.0mol / L acid, 30g / L soluble ions) produced by tri-acid polishing of aluminum profiles includes the following steps:

[0028] 1) pretreatment, the waste acid solution is filtered, and the fiber filter removes macromolecular solids and suspended matter in the waste acid solution;

[0029] 2) Put the waste acid liquid after 1) pretreatment into the system equipped with synthetic polymer (according to the volume ratio of polymer material to waste acid liquid 4:1), the acid content of the discharged water is 0.04mol / L , the soluble ion is 0.92g / L;

[0030] 3) Rinse the polymer material with pure water (according to the volume of the waste acid liquid entering the polymer material system and the purified water ratio of 3:2), and 40% of the discharged is a soluble ion solution (containing 0.4mol / L acid, Soluble ions are 28g / L), acid solution flow is 60% (acid content is 0.6mol / L, soluble ions are 2g / L);

[0031] 4) 3) processing the sep...

Embodiment 3

[0035] The processing method of steel plate pickling waste acid solution (hydrochloric acid is 3%-4%) ferrous chloride 10%-14%), comprises the steps:

[0036] 1) pretreatment, the waste acid solution is filtered, and the fiber filter removes macromolecular solids and suspended matter in the waste acid solution;

[0037] 2) Put the waste acid liquid after 1) pretreatment into the system equipped with synthetic polymer (according to the volume ratio of polymer material to waste acid liquid 3:1), the acid content of the discharged water is 0.38mol / L , Fe 2+ The ion is 2.5g / L;

[0038] 3) Rinse the polymer material with pure water (according to the volume of the waste acid liquid entering the polymer material system and pure water at a ratio of 4:1), and 40% of the discharged is a soluble ion solution (containing 0.45mol / L of acid, The soluble ion is 52g / L), the acid solution flow is 60% (the acid content is 0.5mol / L, and the soluble ion is 3g / L);

[0039] 4) 3) processing the ...

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PUM

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Abstract

The invention discloses a material for treating metal pickling waste liquid and a preparation method of the material. The method includes the following steps of firstly, mixing styrene strong acid cation exchange resin, NN-dimethylacrylamide and potassium peroxydisulfate according to the mass ratio of (75-85):(18-22):1; secondly, conducting reacting, cooling, washing and drying in the shade to obtain the material under the protection of nitrogen in a constant-temperature container. Industrial metal pickling waste liquid is treated through synthesized macromolecules, and it is avoided that waste liquid causes pollution to the environment.

Description

technical field [0001] The invention belongs to the technical field of industrial sewage treatment, and in particular relates to a material for treating waste liquid produced by metal pickling and a preparation method thereof. Background technique [0002] Metal pickling, using acid solution to remove oxides and rust on the surface of metal materials or metal products. Its working principle is that the oxides and rust on the surface of metal materials or metal products contact with acid solution to produce chemical reaction, forming salt and water, which are all dissolved in acid solution. When the acid solution increases with the pickling of metal parts, the acid As the acid concentration of the solution decreases, the salts also increase. Generally, when the acid solution contains 80g / L of metal ions or 215g / L of ferrous salt, the acid solution will lose its pickling function. acid. [0003] In pickling, there is a small amount of acid liquid on the surface of the metal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F257/00C08F220/54B01J20/26B01J20/30C02F1/28C02F103/16
CPCB01J20/26C02F1/285C02F2103/16C08F257/00C08F220/54
Inventor 陆贻春冯晓东
Owner 广西钦州环科水处理有限公司
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